Intercommunication systems



Oct. 9, 1956 A. LESTI I 2, 7

INTERCOMMUNICATION SYSTEMS Filed March 28. 1951 29 sheets-shet 1 5 TL. I

10 QROUPING 4 CIRCUITS /110 CALLING NOS.

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l K H 123 CALLING-TO- STORAGE 2 1| CALLED a a-res 5 5: HM LIF I L113 -E l I. MM TO TRUNKS scmasks 2,: H M E 172 119 LINES H HUN. see

'*==il H I: umrs s #6 Kc. E." 7 TIMING I: I TENS 115 GENERATOR CRLLED-TO- H cmurvq can"! "L595: 1: I QMPLIFIER CIRCUIT 11e I f /'DIHLING TEST FINDER DIAL TONE g, UNITS BUSY rows; m 3 L111 REGISTER 5 LT'ENS I 55;?5? E In STAR-r WIRE/ 101 E 104 TEN m REGISTER 5 SENDER II JNVENTOR. Q RN OLD LE ST! T'TO PNEY Oct. 9, 1956 A L sT 2,766,327

INTERCOMMUNICATION SYSTEMS Filed March 28 1951 SUB-FRAME 10.416/w I I I I I I I I I 16 m I I I rm: CHANNEL #1 may/ M rm: CHANNEL 2 "mm: CHANNEL 12 %I 29 Sheets-Sheet 2 IIIIIIIIIII SUB"FRHME CHANNEL *1 fi CHQNNEL 2 933w *I P/k I I I I I I I I 1' I IIIIIIII. I I l I I I I I I I l I I I 1 g 3 4 5 e 7 8 0 o1 03 08 07 Q1 Q2 CRLLING- T'O' CALLED GATES QMPLIFIER CflLLED- T'O CALLING G'HTES HMPLIFIER v JNVENTOR. H N L. 0 I. EST! H GENES.

Oct. 9, 1956 A. LESTI 2,766,327

INTERCOMMUNICATION SYSTEMS Filed March 28, 1951 29 Sheets-Sheet 4 FIG DETRILED scnsmm'lc 0F sva-rsm INVENTOR. QRNOLD Les-r1 /l w w QTTORNEV Oct. 9, 1956 A. LESTl 2, 2

INTEBCOMMUNICATION SYSTEMS Filed March 28, 1951 29 Shets-Sheet s r 5.:IQEE

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INTERCOMMUNICATION SYSTEMS Filed March 28. 19s; 29 Sheds-Sheet; 7

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INTERCOMMUNICATION SYSTEMS Filed March 28, 1951 29 Sheets-Sheet 12 TATED (BUSY TEST 8 INVENTOR. .QRNOLD LEST'I QTTORNEV CALLED TENS UNIT'5 CALLING UNITS CALLED A a I $.LINn swuuaifis aaoo woeu Oct. 9, 1956 A. LESTI 2,756,327

INTERCOMMUNICATION SYSTEMS Filed March 28, 1951 29 Sheets-Sheet l3 57a (REGISTER) INVENTOR. a5

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INTERCOMMUNICATION SYSTEMS I Filed March 28, 1951 29 Sh eets-Sheet-M INVENTOR. QRNOLD Les-r;

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Oct. 9, 1956 Filed March 28, 1951 AQLESTI INTERCOMMUNICATION SYSTEMS 29 sheets-sheer 15 USV INVENTOR.

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INTERCOMMUNICATION SYSTEMS Filed March 28, 1951 29 Sheets-Sheet i8 FSZQM DELQYT- 625 sum-1 aKc UTILIZATION) 96 KC PuLscs(1,w,) FROM TIMING QENERHTOR PULSE FINDER 3 INVENTOR )QRNQL. D L EST] Oct. 9, 1956 A. LESTl 2,766,327

INTERCOMMUNICATION SYSTEMS Filed March 28, 1951' Sheets-Sheet FROM KC. UTILI neon TIMI m. 9 c, 1

PULSE FINDER 2 we) new PULSE FINDER 3 PULSE FINDER 4 INVENTOR./ HRNoLo LESTI HTTORNEK- Oct. 9, 1956 A. LESTI INTERCOMMUNICATION SYSTEMS 29 Sheets-Sheet 20 Filed March 28, 1951 N. av

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